| author | wenzelm |
| Tue, 12 Feb 2002 20:25:58 +0100 | |
| changeset 12875 | bda60442bf02 |
| parent 12338 | de0f4a63baa5 |
| child 14981 | e73f8140af78 |
| permissions | -rw-r--r-- |
|
2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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1 |
(* Title: HOLCF/Discrete1.ML |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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2 |
ID: $Id$ |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
|
3 |
Author: Tobias Nipkow |
| 12030 | 4 |
License: GPL (GNU GENERAL PUBLIC LICENSE) |
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2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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5 |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
|
6 |
Proves that 'a discr is a cpo |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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7 |
*) |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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8 |
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12338
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
12030
diff
changeset
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9 |
Goalw [less_discr_def] "((x::('a::type)discr) << y) = (x=y)";
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| 3018 | 10 |
by (rtac refl 1); |
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2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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11 |
qed "discr_less_eq"; |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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12 |
AddIffs [discr_less_eq]; |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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13 |
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| 11346 | 14 |
Goalw [chain_def] |
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12338
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
12030
diff
changeset
|
15 |
"!!S::nat=>('a::type)discr. chain S ==> S i = S 0";
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| 5192 | 16 |
by (induct_tac "i" 1); |
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3323
194ae2e0c193
eliminated the constant less by the introduction of the axclass sq_ord
slotosch
parents:
3018
diff
changeset
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17 |
by (rtac refl 1); |
| 3018 | 18 |
by (etac subst 1); |
19 |
by (rtac sym 1); |
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by (Fast_tac 1); |
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2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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21 |
qed "discr_chain0"; |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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22 |
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| 5068 | 23 |
Goal |
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12338
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
12030
diff
changeset
|
24 |
"!!S::nat=>('a::type)discr. chain(S) ==> range(S) = {S 0}";
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| 4098 | 25 |
by (fast_tac (claset() addEs [discr_chain0]) 1); |
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2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
|
26 |
qed "discr_chain_range0"; |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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27 |
Addsimps [discr_chain_range0]; |
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c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
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28 |
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| 11346 | 29 |
Goalw [is_lub_def,is_ub_def] |
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12338
de0f4a63baa5
renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents:
12030
diff
changeset
|
30 |
"!!S. chain S ==> ? x::('a::type)discr. range(S) <<| x";
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| 3018 | 31 |
by (Asm_simp_tac 1); |
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2841
c2508f4ab739
Added "discrete" CPOs and modified IMP to use those rather than "lift"
nipkow
parents:
diff
changeset
|
32 |
qed "discr_cpo"; |